Patent · US Expired

Magnetic valve for controlling an injection valve of an internal combustion engine

US6811138B2 · kind B2 · utility

3Cited by

15References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Kuehne · Stuttgart, DE
Rainer Haeberer · Bretten, DE
Matthias Horn · Tettnang, DE
Christoph Ulmschneider · Spaichingen, DE
Andreas Rettich · Herrenberg, DE

Key dates

Filing date	Oct 18, 2002
Grant date	Nov 2, 2004
Priority date	—
Expiry date	Nov 12, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2547/003
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A solenoid valve is described, its armature having a part that is slidingly displaceable on the foundation bolt and is movable between two stops of the foundation bolt against the tension force of a restoring spring. When the armature strikes the valve seat of the solenoid valve, the slidingly displaceable part moves further under the influence of its inertial mass on the foundation bolt in the closing direction against the tension force of the restoring spring, until it strikes the second stop of the foundation bolt. The resulting transfer of momentum to the foundation bolt reduces impact of the armature on the valve seat and causes the armature to more quickly reach a defined rest position in which the solenoid valve is closed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.